Mine breathing apparatus.



W. GIBBS. MINE BREHHING APPARATUS.

APPLICATION FILED JULYB. HHS.

Patented Mar/21,1916.

S SHEETS- SHEEI i ir tfs W. E. GIBBS. MINE BREATHING APPARATUS.

' x A APPLICATION FILED JULY9,1915. 1,176.71 1. Patented Mar. 21,1916. psnm's-suzu 2.

W. E. GIBBS.

MINE BREATHING APPARATUS.

APPLICATION r1120 lULY9. 1915.

Patented Mar. 21, 1916.

9 SHEETS-SHEET 3 W. E. GIBBS.

MINE BREATHING APPARATUS.

APPLICATION FILED JULYQ, i915.

Patented Mar. 21, 1916.

W. E. GIBBS.

MINE BREATHING APPARATUS.

APPLICATION FILED IULYQ, I915- 1 ,176,71 1 Patented Mar. 21, 191i).

9 SHEETS-SHEET a. 19

M'Tnus W. E. GIBBS.

MINE BREATHING APPARATUS.

APPLICATION r1150 1ULY9. 191s 1,176,71 1. Patented Mar. 21, 1916.

9 SHEETS-SHEEY 6.

Jay. 12

y W. E. GIBBS.

MiiiE BREATHING APPARATUS. APPLICATION FILED IULYQ, |9|s.'

Patented Mar. 21, 1916.

9 SHEETSSHEET 7.

W. E. GIBBS.

MINE BREATHING APPARATUS.

APPLICATION FILED JULY 9. 1915.

1,176,711. Patented Mar. 21, 19m.

9 SHEETS SHEET 8. ly, 90 116' ftg.

fig. 15. 39.19 1?? 1 1;?

W. E. GIBBS.

MINE BREATHING APPARATUS.

APPLICATION FILED JULY 9. 1915.

1,176.71 1. Patented Mar. 21, 1916.

9 SHEETS-SHE 9.

tial elements of the apparatus comprise a UEETEEE TENT QB WILLIAM E, GIBBS, 9:? NEW? YQBK, 1%. Y.

MINE Bras-arenas Arrana'rris.

Specification of Letters Patent.

Application filed July 9, 1915.

To all whom it may concern:

Be it known that l, umen E. GHLES, a citizen of the United States, residing New York, in the county of New York ano State of New York, have invented a and useful Improvement in Mine Breathing Apparatus, of which the following is a specifiiation, a

My invention relates to that class or mine breathing apparatus which supplies an artificial atmosphere to a Worker in a. poisonous gas and permits the wearer toe-liter with safe 1y an exploded or hurning m ne or other inclosure whose contents are irrespiraole. Devices of this character are well known, but for one reason or nother, have heretofore been unsatisfactory in use.

The object of my invention is to overcome the objectionable features in such apparatus and to produce a breathing apparatus hay ing a maximum degree of safety with minimum amount of discomfort to the wearer' My complete breathing apparatus is up of a numlfir oi interclepei' dent devices whose cooperation determines its successful action.

Before entering into a detailed description of the sei'iarate elen'ients which make up my breathing apparatus it may he noted that in common with other devices of its kind, it consists of a distensihle chamber containing highly oxygenated air and having a. tube leading to the wearers mouth, through which he inhalcs and a second tube which carries the exhaled l1 oath through a can containing: caustic soda, or its equiyalent, and back to the distensiblc chamber. Valves in the system insure a flow of the oxygenated air in one direction only. The other essenreducing valve, or pressure regulator, connectcd to the oxygen tank. for lowering the pressure 01" the oxygen to a manageable quantity, and in my particular apparatus, an oxygen admission valve which feeds oxygen of a low pressure into the system as required by the wearer, and which in turn is actuated by the movable side of said Clistensihle chamher, and a pressure gage for indicating the quantity of oxygen available, said gage being read-by touch and having an alarm which warns the. wearer of the approachin exhaustion of the oxygen supply. In addition to these elements of the apparatus,

iatented Mar. 21, 1916.

Serial No. nasa there are straps and belts for supporting it upon the wearer and some form of mouth The following elements of applicants apparatus are considered to have special advantage over the forms of apparatus now. in useathe breathing chamber, the purifying or regenerating can or receptacle, theselucing valve and the pressure gage and in addition, the fact that all of these parts are carried upon the back of the wearer, thus placing the apparatus in a position least inconvenient to the wearer. The breathing chamber is provided with'm-etallic Walls which furnish a large radiating surface, this obviating the need of a special cooling chamher.

In the purifying or regenerating appara tus now in use, the absorbing medium, such for example caustic soda or caustic potash. is arranged in superposed layers composed of sticks, lumps or granules of said material providing a filter for the air, or said material disposed in. trays having -ing impermeable metallic bottoms anti woven wire covers, or it is (lisposed in fiat pockets formed at both sides with permeable material, said. layers, trays or pockets, being so arranged that they are successively traversed by air passing, in a circuitous manner through the apparatus. Air regen-L,

erating apparatus of these. types are objectionable because the granules orilumps of caustic potash coalesce more or less and also as the lumps get smaller by use, they lie more compactly together in the layer type and oonsirlcrahle resistance is ollercd to the free flow of the air, especially after having been in for a time, or the water or carbonate that forms covers a portion of the surface of the granules in the tray type, and moreover, in all the types in which granules or sticks of caustic potash are used said lumps or sticks have a constantly decreas inqsurface they Waste away, so that their ea gradually decreases F or this reason a consirlerahle excess of caustic potash must be present. ii'hich is undesirable, in that it adds weight to an already heavy apparatus that must he carried by a man, under most unfavorable conditions.

.ciency as an absorber of carbon dioxicl,

manner that the unused part thereof will remain securely in place until the whole is consumed. 4

Mme-breath1ng apparatus for use in 1riirable atmos )here su lies oxy en conl c stantly to the user, While the carbon dioxid is absorbed by caustic potash or caustic soda, the nitrogen of the air with which the apparatus is initi lly supplied, remaining unchanged. While in the lungs, the oxygen is partly absorbed, and the remainder takes up carbon from the blood so that the exhaled air, some-what diminished in volume, consists of carbon dioxicl (CO and oxygen, with some nitrogen. During the passage of the exhaled air through the caustic soda, the carbon dioxid is absorled, so that by the time the distensible chamber is reached, the exhaled air is nearly free from carbon dioxid, but is considerably reduced in volume. Oxygen, from a tank of compressed gas, is supplied to the system to "compensate the loss mentioned above, and

keeps the volume of air in the system practically constant. It is found advisable to have the atmosphere in the system very rich in oxygen when the wearer starts to use the apparatus, because much of the commercial oxygen is manufactured by fractional distillation from liquefied air and contains a small percentage of nitrogen. Since the nitrogen is not changed by the process of breathing, it accumulates in the apparatus and might eventually form so large a prd portion of the. air in the system that the mixture would not support life. No harm or discomfort follows the use of pure oxygen in apparatus 0.! this kind.

My inventici. rovides for coating thin wire gaguze sheets with fusedcaustic soda or other suitable carbon dioxi l. absorbing .malcrial so that said sheets support and strengthen the plates while in use. Several such plates are placed vertically and parallel to each other in the path of the carbon dioxid which is to be absorbed, said. plates eing spaced :1 lill'lC t'flll distance apart to lie in): How of Lhe expired hi! there iuiplcto lir number whose ouizPbiilIi- :oiiuz. and in apparatus is made srdepeiuloiit devices :rmincs its successful lee invention consists construciilm, combination and 21' uncut of the several parts 01'' the appa- :is will be licr-aiua'l'ter more fully dcv l prirt rularlv pointed out in the 1m;- 'i llf 'll are apprudcil luv-12o and fl'orm a part of this appii'rafi i.

in describing my invention in detail. reference will he had to the accompanying drawings wherein like characters designate like parts throughout the several views, and in which:

Figure 1 is diagrammatic illustration of the How of oxygen and air through the apparaus and lungs. Fig. "2* is a perspective view of the apparatus in position on the wearer ready for actual use. Fig. 3 is a front elevation. Fig. 4 is a rear elevation. Fig. 5 is an elevation of the right side of the apparatus. Fig. (3 is a section of the line 6-6 of Fig. 1, the lower part of the apparatus being broken away. Fig. 7 is a horizontal sectlon through the distensible breathing chamber and bellows on line 7-T of Fig. Fig. 8is a vertical section on line 8-8 ofFig. 4. Fig. 9 is a section on line 9-9 of Fig. 8. Fig. 10 is a'section On line 10-10 of Fig. 8. Fig. 11 is a longitudinal section of the admission valve. Fig. 12 is an elevation of the lever which opens the admission valve. Fig. 13 is a vertical longitudinal section of the air purifying or regenerating chamber. Fig. 14 is a horizontal longitudinal section of the purifying chamber on line 14114 of Fig. 13. Fig. 15 is a section on line l515 of Fig. 13. Fig. 16 is a section on line 1616 of Fig. 13. Fig. 17 is a vertical section through the pressure, regulator or reducing valve and tube leading to the pressure gage. Figs. 18 and 19 show sectional details of the toggle member 89. Fig. 2O is a longitudinal section of the valve 93.. Fig. 91 is a plan view of the rod 90. Fig .22 is an elevation of the pressure gage, the. casing being removed. Fig, 23 is a section on line 2328 of Fig. Fig. 24 is an elevation of the front of the gage. Fig. 25 is an elevation of the rear ofthe pressure gage cap and casing. Fig. 26 is a section of an alternate orm of breathing chamber.

In order to facilitate the understanding of the detailed description of the apparatus an explanation of the diagrammatic scheme of the apparatus as shown in Fig. l is inserted at this point. T

The principal members of the apparatus are the mouth piece 1, Fi 2, breathing and cooling chambers 2, comprising a distensible chamber having one side formed with a bellows 13, an absorbing can 3 containing plates of caustic soda or other absorbing material for carbon dioxid, a pressure 1educer 4, a pressure indicator 5, an oxygen tank (3, an admission valve 7, normallyheld shut by a spring and opened by a lever 14, and push rod 15. The mouth piece has two tubes 8 and leading to the absorbent chamher 3 and the breathing chamber 2, respectively. In these ti bes are two check valves 11 and 1: opening in the direction indicated by carrows. When the wearers lungs are Ill lit

cbntracted during expiration, air passes from them 'thrnrzgh the tube 8, li fLS tlmiii. 3

hul wen the plates M an which .rher if carbon dioxid is snpportmL where will (an ll (lioxid is removed from all The rvn'mindu of the air then paw s int/0 thn clunnhrr 2 whrre the bellows 13 yields in the dirnastion in the arrnw to make mom for it. During; expiration he valw: remains clusecli pun inspiration. the alve l2 opens and the purified air pa: 5 min chani 'mr tn the lungs the bellows l3 expanding as the air leaves the chamber. The purified air which returns to the chamber 2 will he l0 in volume than that p 'iun" drawn out of it an inspiration ay innmnfi that is changed inin n'nlvr in l the amnam l lnngza nl lhv irear r, and hi all 15 il nrhed by tlw mai on lhn Phil/ES jlil. After av fe infir i in number rlegmndmg 0n the annular, in work than the wearer of the apparatng i. iiloniga tha hel lnws 13 expands sufllciently l0 mnve the infer A and the push rod 15 t0 open the oxygm admissicn valve 7. Oxygen (:IiiGYS the chamber 2 driving the bllnws 125 before it until the loss in volume is restorcrh V"l\0lt upon the bellows leaves the lever 14 and the admission valve antnmatically clams. This; intnrmil tent gen feud is made n;

by the perfecion of the reducing i'zil're l which lakes the l'rnm the maygien hank l at the prnssnre of about LLGQO lbs net square inch and. reduces it to a gn essnr of 2 lbs. per si 'imrn inch at the admission valve. ln the procass of absorbing lihn mix-mm dioxld fruni ilnair in the can 3 thr-clmnlml reaction liberates considerable limit, so that, the air whirl passes into clnimher 3 is ton hot to he breathed. The large @iirfmsn 05 this chamber arts such an elliiriunt hunt radiate! that, even under ('Oll'rllllfilli- 0? 930 tren'w labor the air which enters the lung: is comfortably cool. In order that. the amount (if oxygen rmnznning in the llllllli (3 may be: known all any tinm 1! pressure gage 5 provided, which may he read by tonrth as null. as by sight- :ine! whi h ,innrl an The munch pier-e cinn n'iws a m gmrlwil h) 'r-UHIM '17 which arr; All ill ll in il Quill-11p l s. The l'nlws and f Emile air light :vui'rugnlml ulnstii: mat-maul zinf Fill l l t-um Ylw nimillrpiecc. mew iln dew. one Lube m7. mivh side, tlw tnlws on ilw 5. sun

iigln, side liming; :iimiflierl In 1.9 which prone l HVV UCI from (in:

lion 4;! a i. conduit '21! W l tucheai H11 3% r limit face of he "la, chaniher :n thy right side Lherv'rl and tends helnw said chamber "3:; Chi: left tube 9 is nitacheiil to the nippl l whn-h projects forward rum conduit 5 which is attached an the lrnnt furs: of the breathing chamher at the upper halt hand corner thereof. and which extends down ahi'mt a third of the vertical height M the chamber 2. The lower Wall of said conduit extends at an acute angln from the frnnc \rnll The breathing (-hannwr is six sided, having a tapering contour. the front; wall 24 being vertical and ider st ilie bottom than at the top The bottom is con'lpa'ratiwly wide and the rear Wall '26 ascend. vertically for i! short (finance and then ri'ii'iveiges toward lliv frm wall in thatun wall 27 which is v "(in Milli; 2S r frflm nxzrll and rigidly S8- 1! brazing, or ()tlIEZVs'iSQ, ml; the side ai. J smrnred to a flanged edge of the .nnnli-er 2 by bolls and nuts 30, a gaske t 15%) being internosod lOPl-WQff-fl the Willi invl the flange. Inside the chamber is a lmllmYs-lik0 member 13 which mares tmmrvi. the} rear wall thin; providing rmnn for the WQi-LF-"E'S breath ilnring expira- 1' L a call renfl a) tlw chamber 2 eqnivzilunz in a n ill M2. The rear Walls of il rhmnl'ier and wilo s are provided Willi regisam'ii I I-l 1Ef l- 2'51 which permit the free nwrummt of air out and in during: M ration and inag'iirntinn. The ripening ill in the rhzm'ihw ()-QX"(l by a curved :nrmlmr 3 fm' mu ling out, dirt, whirl; n nrml in tin; mar Wall by b018,

and nuts I "liw lllllilbhl ll mlw T is lfiii ff'll inside the breathing ilwmlim' in the, In 121' i'i thl hand mi and rr-iir all z llnn i9 5 Kl: i mama, will; :1 nipple 124 prniociing m of maid r-lnnnher. This nipplv is Lhrorzdwl Pxtomull; and internally and raw *5 u in}: ii Siil'Q'WHl upnn the exl'srnal threads :nnl an ;nljii:-'ml,:l tuhnlar moznlmr Lil) ExiflHK'r-"l him this nitrrnal Lin :iwli. whirl) spring lit? l l I v 'llm' illlll' lf ill:

' ii upemngsin'milia131 valve 7. The long arm of the lever is pressed upon by the spring 35 which is secured to the bellows and carried forward thus moving the end of the short arm rear ward and lifting the ball valve from its seat permitting the entrance of oxygen. EX- pired air passes from the wearer through tube 8 and conduit 20 and through tubes 36 and 36' into the purifying can or receptacle 3. A safety valve 175 is shown in connection with the admission valve but it may be applied elsewhere in the system.

The can or receptacle 3 is in practice made about 4. inches wide, 6.; inches high and 12 inches long. A vertical partition 37 extends longitudinally through the can from one end to about half an inch from the other end. This partition is preferably soldered to one end and to the top and bottom of the can. The openings for the entrance and exit of the air are'on opposite sides of this partition at the soldered end thereof. Cross pieces or braces 38 about an inch wide extend from the partition to the sides and are soldered thereto forming six subclzambers. On each side of the partition 37 are placed three caustic soda carriers 39, one in each sub chamber. Each of these carriers comp!- a plurality of reinforcing plates or sheets 16 of corrugated wire gauze held in spaced re lation by means of strips of sheet metal 10 folded into U-shapcd loops. Zach plate is clamped at its corners in alternate loops of the metallic pieces 40. In practice the upper end of the carrier is dipped first into fused. caustic potash or caustic soda, for the reason that the dipped end retains more material than the other end and the plates become thicker at that end so that when iii-- verted in the can the spaces between the plates at the top are narrower. The caustic soda forms an adherent deposit on the carrier. In use, the plates waste away more rapidly at the top than at the bottom. By making them wedge shaped the unequal wear is compensated and the gauzes remain covered with caustic over their entire surfaces until they are exhausted. I have found that bcttcr absorption of carbon di oxid is obtained with caustic soda which contains a considerable proportion of water than with the anhydrous salt. and I regard that mixture best. which melts at about 120 (l. and boils at about 200 C. The carriers are supported at the bottom on a wire {gauze 41 which restsalpon a mass of absorbent material 42 which receives the dissolved caustic soda and prevents its possible ontran e into the breathing tubes. The cross strips 5S prevent the air from passing eve: the tops of the carriers 35 ausing it t between the plates. Within hc lltllllifjfl at the end of the can are Whatl 21:15: 1 carrying ros but" i ir ll i threaded aperlms -1il\ center of the openings in the can. The purpose for which these spiders are pm vided will be described later. \Vithin entranc opening of the can is placed a be plate 45' to spread the exhaled air ovari n: so plates.

In order to provide a supply of oxygcr tank or-bottle l) is provided havimaw i connection tube leading to the lire-a a chamber. The breathing cl'aamber. caroou dioxid absorbent receptacle and auii; and their connections are supported upon 1: framework 4:") which comprises hollow tube bent into a form having horizontal portion 46, inclined portions 5H,; crli al (it sccnding portion 48. looped portions lil. ri, right angles to the plane of said portion in. 1-7, and 48, and ascending portions 50 tending to about two thirds of the height of the frame. At the top of the portions an are horizontal cross pieces 51. each of which rigidly secured at its ends to the top of one part 50 and to the adjacent part of portion 48. The l'n'eathingzi chamber is rigidly secured upon the two cross pieces il. b means of bolts 52 and reinfracing plates 53 inside the bottom of the breathing: chmul Near the lower ends of the ,)ll'i 3lri it rigidly secured a plate 54 can-Yeti to it lb back of the wearer and "urcd t :ll 48 by means of L'shaprd pie ion are riveted to plate and secured to rod 48 by loops 56 whose ends are boi d to the main portion at Upon th portion 16 of the fra ne is pivoted a triangular n'wiubcr 10" by means of a sleeve for which cl to rod 46 and received loosely on the triangular nieu'iocr. if. r c other two sides o mid member H r cured by a stitched loop. (3n the in. of each of said straps is secured render the strap more C(Hillli liign. 1-! wearer. Th se straps are perforanzd a. cent the ends and receive one end of a d uble ended hook G1, the other E of which is hooked into a perforation in the member Two cross pieces (ii are rigidly sutured to ips the frame about midway between the st! 51 and looped ends a?) and paralle to 5;: cross pieces 51.

The purifying reccpta le 25 is set in frame between the cri- I l and and is held secuzeiv tl re n by means 5 bolts 63 and (it which thrrimu'h (3 and 66. respectively, the thiczuled rnd o said bolts being crewed into the spi er; 3-). (using 65 is cylimirical and is secured tconduit 20 by a tube 256. which pe entrance of air into the casing (35 to the absorbent can 3. rigidl secured to chamber 1'. by m 1.1 of a (lUH'Hl tube 7 through which passes a bolt "which on: a threaded 'ierfomtion in all 25 of chamber 3 a lab is connected with transmission gearine the last member which is the escapemcnt \vheel 119. Mounted between the plates 140 is a pivotrod which carries the hammer 151, pin 152 and escapement anchor 153. When there is a sufiicient predetermined pressure in the Bourdon tubeit tends to straighten and the pin 139 contacts with pin and prevents by means of the anchor 153 any rotation of the escapement wheel 149 and allows the spring 143 to be wound up, but as soon as the pressure within the Bourdon tube is sufficiently reduced pin 152 is freed from pin 139 and the alarm rings, thus notifying the wearer that it is time to return to safety.

Rigidly secured to the base 137, is a sec ond base 154, to which is secured a second Bourdon tube 155. At the free end of the Bourdon tube is pivotally secured a curved link 156, which is pivoted to the short arm of a. lever 1.57. Upon the long arm of lever 1.37 is rigidly secured a pointer 158. Pivotally mounted upon a stud 1.59. is a snail provided with a reinforcing: disk 161. A spring 162 is secured at one end upon said stud in the rear of the snail. and the other end is secured to a pin on the rear side of thesnail. The spring tends to turn the snail to the right, said movement being limited by a stop 1G3 bolted upon the end of a bolt 14 1. Upon one edge of the snail are notches spaced equal radial distances from each other against which the pawl 157 cugages. In the circund'erentiallv curved edge of the snail is a notch 1M. The spring: is confined between the snail and a uuard disk 165. A cylindrical casing; 166 fitting over the base 136 and secured thereto by screws incloses said Bourdon tubes and their ac cessory parts. The casing 166 has a larue opening 1156. Upon the front face of asing 16G is'pivotally mounted a flano: disk .16? which fits over the front of [ac vasing' like. a cap. This disk is pro 'iderl with a curved sight opening 168 adia cut the convex edec of which is engraved a graduated scale 16!). Said sight opening is provided for the oo servation of the pointer l 5. When the oxygen pressure is high the straightcnio of the Bout-don tube will pull upon the short arm of the lever and throw the pointer to the upper portion of the sight opening and the pressure may he read upon the scale 169 the graduations of which indi ate relative pressure inside the tank. The front disk 167 carries a stud 170 which projects inwardly andengaues notch 164 in the snail. A shoulder on the lever 15'? engages the notches on the snail and limits the rotation of the disk 167 according to the pressure in the oxygen tank. When there is a high pressure in the tank the, ion; aim of the lever is mo ed to its outermost position oco the snail may be moved to the fart? llllllt of its rotatum lieiiu-c a notch .wl'llic'w' the shoulder of the lever. 'l'he loi1 .Ycr stands at its outermost position a way irom the snail until the reduction in the oxygen presore takes place. when movement oi the lever takes place in direct proportion to the reduction in pressure.

hilounted on the interior ot' the cvlindrical portion of the casing imnm tely ad jacent the ront face is a spring}; 1 .l. which carries a wedge pointed finger or pin 172 which projects through an opening in the casing and engages notches on the interior of the flange or disk 1-37. These notches 173 are adjusted to cm'respond with the notches in the snail 160. The wearer may ascertain the relative pressure lIW rot-at ing the disk 167 when the pin 1??! will click as it drops into the notches 173 and will also produce a percussive viluation and an intermission of motion vvhich may be readily ceivcd by touch. \Vhile the wearer can not ascertain the pressure Within the tank by visually reading the indication on the scale. vet this means of ascerti-iining the pressure has its utility in that companions may thus readilv ascertain the oxygen pressure and tell the wearer.

An alternate form of breathing chamber is illustrated in Fig. 26. In this form the l'JQllOWS is placed on the outside of the rigid breathing; chamber and this new itates some modification in the structure of the breathing chamber. The front wail 24' and bottom wal 35' of chamber 2' are of sub stantially the same shape and i chamber 2 described above. The 2o parallel uitl: the front Wail 2t the Wall 21.3 which is really a portion of the rear Wall. is parallel with the bottom Wall 55". In the angle forum-d by walls 26 and 13h the bellous 13 is placed. be arured. to the rigid portion of the t by means of bolts '33 which pass through the Walls 21 and 3 3' and the front wall of the bellows 13. The bellows carries a projectin; finger 235' which. as the oeliows dcfluted. strikes a rod 15'' which opens the ad" mission valve T The adm ssion valve '7 is placed outside of the lmnilier i" and. the valve actuating rod 15 traverses the entire leueith of the casing- 1133. held on its seat bv a spring 127. The breathing chamber is provided with a rigid protecting cover 174'. which carried down over the absorbing: can and reducing valve. Said cover 171 beinfl detm'tl'uible. may be left ot? the am'iaralus when desired.

Having thus described my invention. 1 claim as new, and desire to secure by Letters Patent 2 1. In an apparatus of the class described,

The valve 12s" is 1 a plate consisting ofii reinforce and caustic soda geposited upon Said reinforce 2. n a carbon dioxid uhiaorhing devioe is reinforce, caustic soda or other carbon di oxid absorbing material deposited upon said reinforce and means for retaining said plate in spaced relation with uiher plates 3. In a carbon dlGXlil :il rhing' device u frame consisting of a seii-zxs of plates or sheets held in spaced relation to each other and having i1 coating of solid 02 rhon dioxid absorber deposited upon said plains, and an ahsorheni inalieriul bfillifilc. id plates.

4. in a carbon dloxid absorbing device ii frame consisting of a series of reticulated sheolis held in spaced in in e mh other and liming u cor we," o3 ci' soda or equivalent un /(aria? derid -5rd upon guid sheets, and rhrni mu? l arranged to receive the drainage ironi :fiiii ii. in u czirhon filo? iiliior iw frunse consihiin r of :i WWFE: l reticulelcd is; held in rigid 2- tion to each other and. having: a coating of caustic soda or e uivulent material deposited phit ' upon amid sheets.

6. In an apparatus of the class described the combination with a casing having means for direciing ii current of air therefhrough, of reinforcing plaic or sheiais haying caustic soda deposited thereon and spaced apart to permit the page of air thcrebetween.

7. In an a ipurutusz of the class: described. the combination of ii receptacle having a partition which divides the receptacle into two compartments rhroughout the maior portion of said receptacle, and a plurality of reinforized sheets of caustic hodu placed upon each side of sand pm'tiiinn.

in :in :ippiiruti liilfif rlcezcrihed, the comhirniria'ui of ii i :iclc liming Lil! iiilel, opening: And an onlyopening: in one end of sniil i'cni'pl'ucir. ii! :i purliiion which divides the rewptucle into mo coinpsirt; merits throughout 5hr niai r poi-lion of suid receptacle. Illlll :i pluriiliiv of spa ed reinforced shccfs or plate: 1 i (Zillillfi soda placed upon ouch ride is? "iiiil puriilion in the path way oi the exhaled Ell ll" pflbfilllg froln (he inlet to the outlet of said receptacle.

9. In an fliflmlzilils of iii-3 'L,l5-' described, the combination \i iih ii casing hr 'ing a pin-- tifion reaching from one end oi mid in to 22 poinl adjacent the opposite end of id raising. of n plurality of sheets; provided with an adherent deposit of ciiusrio soda or pozauh and placed in the pathway of rho exhaled :iir passing from the inlet around the end of said partition mthe outlet of said receptacle.

10. A mine breathing apparatus comprising a horizontally arranged purifying receptacle. a above said receptacle. connections communieating with tho ouilet end of said receptacle breathing chamber immediately and with the corresponding and of said. breathing chamber, and a frame rigiiih uniting said parts.

ii, A mine breathing app ing ii horizontally arranged r mrifying rec ptacle irurneil' tank cornice cos con'iunii outlet cud of the funk and v; i "who corn spending end of the re urmiihii chamber having connerimns huh fil lll ilul mill receptacle and ii frame rigidiy cnitii' v id. 91822 17L A mm hreulhiug rams comp): lug ii lioriuon'zall arranged oxygen tanlm purifyiiw recenlzicle immediately above sub: hi'nlz. con connnunicn Eng wiih ilzi eiul oi the will; and with the corn;-

end of the recepimi'le. a hreaihii niunedizitoly above said reoeptmrlr, ilwl i hetween the outlet end of the rece clv and the. corresponding end oi? the liiirzi hing chrnnher. and :2 frame rigidly uniting mild parts.

13. in a mine breathing apparatus, purifying rcceptzicle a breathing nhinnhcr haw" iiig two inlet, ports and one outlet port and distensihle Walls and a detachable protecilug cover therefor.

iii A mine breathing appzi "311L154 coiuprie iiig a breathing chamber, a unifying recep 9 triple and an oxygen tank arranged in the, saline vertical plane and in parallel relutiong a pressure regulator and a pressure gage :12 Ill!- corresponding ends of said receptacle and tank and beneath the projecting end of said breathing (Tllfll'lll'ifil' and a frame rigidly uniting said parts, effecting a Cflnlpkwll arrangement of all the elei'nents of the com hinerl structure.

' mine hrezitlilngz vim. compri i i. in a i'l'ulfll i'l' comprising rigr mil liii 'im l t-l i'iisicnsihle nu thereon and in coi'ninuuicuimi: chamber. ix hcrchy ihe capacii licr rczulilv co'sil'orn'is to Llie we Lory cfi'oris.

lit in ii mine breathing upg'izirutusa ii breathing." chamber having rigid walls, the

rem- \\;il having 'a distensibie ineinlmr mount-(l tlieremi, said chziniherg huring 2H! opcni'ig i-oniinunkrating with the interior 1;

(hi,- rlivien -ihli member. thusproviding: ii

clminlwr of i'iii'i:ilile capacity which law;

ronfornis lo the W urers respiration.

17. in a mine breathing apparatus 1i breathing (-lriniher having rigid mills. the l\";11' \Hll inn ingz u bellows mounted increon, (he reur wall of the chamber and the aaija ccnL all of thehellows liniii'ig regie-iering openingu thus providing a chamber of variable capacity an admission vuliu for oxygen and a lever secured to {he Cllulillmi, having a rod connected therewith, which cooperates with the admission valve to permit the entrance of oxygen into the churnhei:

Tier nn 'unieil sriiill i u s N. In a "line breathing apparatus the muuunazi i a iuasrli or mouthpiece. of

an an p up; receptacle. a disteusiblo breathing ri.,.unl ci' having metallic walls uhich act as a oler of the purified air and ducts suitab y conne ted to said parts to pr du e a respiratory syst m.

it. In. a lHllH breathing apparatus the ernhinatiou with a aural r mouthpiece of a br a hing chaiulu-r. an air purifying recepiarle. and du is suitably connecting said parts to prwlure an inhalation and exhalation breathing J- t'.lill said breathing: cham her havilul metal ic wallwhich act. as a cooler or the purilied air.

:30. in a mine breathing apparatus the eoinhinati n with a maeil r mouthpiece of an air purifying can or receptacle. breathing chamber. having metallic walls which act an a cooler ol' the purified air. a tank ray-en under pressure. a pres manpriring touch and auditory .ans a pressure regulator per- "ai mlurtion in pressure of the muuectingi said parts to pr 4*. llfl tll lfl'l .itlililll s\' -I'GIY1.

a mine reathing aprmratus. the

um,- oi ton-h and auditory indicat- (gen . Multiply couzbiu: ing means (Ulilj' sing a casing. a Bourdon tu e linked to a lever which carries on one end, a pointer which coat-ts with a scale on the casing. said casiug also carrying a spring and linger which courts with notches on a cap which is rotatable upon the casing hringinp the notches successively into coaction nith the said linger producing a click and an ii'il'e1iiiis i m of motion.

52. In a mine breathing apparatus. a pressure regulator comprising a main cylindrical portion having an aperture and a bellows diaphragm closin; said aperture. laid main portion ha vine two bosses diametrically opposed to each other. said bosses having alininn' longitudinal openings. a valve member wui-tiyw of an inlet nipple in threaded en naueimnt with one boss and a sleeve carryin a valve clmure. said sleeve being loosely mounted in the other boss. a toggle lever ha ing; ltnii'e edges which hear at one end against a things on the sleeve and at the other again t the interior of the main portion in op pwwd relation to ach other. a yoke connectir the o glc with the bellows diaphragm whereby the toggle may-be brought into parallel relation with the valve and exert a powmiul but delicately adjustable pr ssure upon the valve.

In a mine breathing apparatus. a pres sure regulator comprising a main cylindrical portion having an outlet. and. having, an aperture and a bellows diaphragm closing said aperture. said diaphragm being coaxial with the main po'tion of the regulator and detachably secured thereto, said main portion having two bosses diametrically opposed to each, other. said bosses having alinmg longitudinal openings. a valve member corsisting of an inlet nipple in threaded engagement with one boss and a sleeve carrying a pl ug for closing the valve. said sleeve being loosely mounted in the other boss, two collars loosely mounted on said sleeve, one hearing against a flange on the lower end of the sleeve and the other being loosely mounted in the other-boss a toggle lever having sharp bearing edges which bear in notches in the collars in opposed relation to each other. a rod connecting the hinged portion of said toggle and the central portion of the bellows diaphragm. whereby the toggle may be brought into parallel relation with. the valve and exert a powerful but delicately ad justable pr ure upon the valve.

:34. In a mine breathing apparatus. a pres sure regulator comprising a main cvlindrical portion having an outlet and having an aperture and a-bellows diaphragm closing said aperture. said diaphragm being coaxial with the main portion of the regulator and detachably secured thereto. said main portion having two bosses dian'ietrically opposed to each other, said bosses having alining longitudinal openings, a valve member consisting of an inlet nipple in threaded engagement with one boss and a sleeve carrying a plug for closing the valve, said sleeve being loosely mounted in the other boss, two collars loosely mounted on said sleeve, one bearing against a flange on the lower end of the sleeve and the other being loosely mounted in the other boss, a toggle lever having sharp bearing edges which bear in notches in the collars in opposed relation to each other. a rod connecting the hinged portion of said toggle and the central portion of the bellows diaphragm and a spring opposing the action of the bellows, whereby the toggle nr. be brought into parallel relation with the valve and exert a powerful but delicately adjustable pressure upon the valve.

In witness whereof I have hereunto set my hand. 

